Dear all, I recently purchased nitro rs4 rtr evo3+. Initially it ran well without any problem. But yesterday I realized the throttle of the engine was very high even at neutral. The speed at neutral was uncontrollable. I had to constantly apply brake to control the car. What could be the problem? The temperature is also very high. After tuning, it was in 100 degrees. But yesterday it went beyond 128 degrees. Please advise.